US3443522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Positive-displacement pump
Assignee: Individual
•
Filing: 1967-07-10
•
Granted: 1969-05-13
•
Expires: 1987-07-10
Abstract
No abstract record available.
Inventors
- 👤 Werner Schindler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:10
CPC Classifications
F; F04; F04C; F04C14/00; F04C14/24; F04C14/26; F04C14/265
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1853430A
Cited
US1944648A
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US1877688A
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US2079375A
Cited
US2405061A
Cited
US2437791A
Cited
US2627232A
Cited
US2787963A
Cited
US2786553A
Cited
US2915977A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |